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Performance Tips ================ Intel GPUs ---------- #. Keep the system updated with the latest kernel and Mesa versions. #. Ensure SoC firmware is up-to-date. These firmware updates currently require installing the Windows graphics driver; firmware updates via `fwupd` are in progress. #. Use Wayland where possible, as it supports additional modifiers for better performance. #. For MTL and newer integrated GPUs, disable VT-d if virtualization is not needed. #. For discrete GPUs: #. Enable `ReBAR`_ #. For workloads that keep the GPU busy (e.g. 3D videogames), minimize idle power consumption by enabling `ASPM`_ powersave mode. #. For "bursty", latency-sensitive workloads (e.g. AI inference), enable ASPM performance mode. .. _ReBAR: https://www.intel.com/content/www/us/en/support/articles/000090831/graphics.html .. _ASPM: https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/6/html/power_management_guide/aspm Software rendering ------------------ #. Turn off smooth shading when you don't need it (glShadeModel) #. Turn off depth buffering when you don't need it. #. Turn off dithering when not needed. #. Use double buffering as it's often faster than single buffering #. Compile in the X Shared Memory extension option if it's supported on your system by adding -DSHM to CFLAGS and -lXext to XLIBS for your system in the Make-config file. #. Recompile Mesa with more optimization if possible. #. Try to maximize the amount of drawing done between glBegin/glEnd pairs. #. Use the MESA_BACK_BUFFER variable to find best performance in double buffered mode. (X users only) #. Optimized polygon rasterizers are employed when: rendering into back buffer which is an XImage RGB mode, not grayscale, not monochrome depth buffering is GL_LESS, or disabled flat or smooth shading dithered or non-dithered no other rasterization operations enabled (blending, stencil, etc) #. Optimized line drawing is employed when: rendering into back buffer which is an XImage RGB mode, not grayscale, not monochrome depth buffering is GL_LESS or disabled flat shading dithered or non-dithered no other rasterization operations enabled (blending, stencil, etc) #. Textured polygons are fastest when: using a 3-component (RGB), 2-D texture minification and magnification filters are GL_NEAREST texture coordinate wrap modes for S and T are GL_REPEAT GL_DECAL environment mode glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST ) depth buffering is GL_LESS or disabled #. Lighting is fastest when: Two-sided lighting is disabled GL_LIGHT_MODEL_LOCAL_VIEWER is false GL_COLOR_MATERIAL is disabled No spot lights are used (all GL_SPOT_CUTOFFs are 180.0) No local lights are used (all position W's are 0.0) All material and light coefficients are >= zero #. XFree86 users: if you want to use 24-bit color try starting your X server in 32-bit per pixel mode for better performance. That is, start your X server with startx -- -bpp 32 instead of startx -- -bpp 24 #. Try disabling dithering with the MESA_NO_DITHER environment variable. If this environment variable is defined Mesa will disable dithering and the command glEnable(GL_DITHER) will be ignored.